According to reports from the Japanese Ministry of Health, Labor and Welfare, the results of the survey conducted by the Japanese Ministry of Health, Labour and Welfare have found that among the 17 types of lenses that have been certified in Japan and sold on the market, such as magnifying pupils or changing the color of pupils, 10 kinds of iron oxides have been detected. The pigment component is exposed on the surface of the lens. Four of the product pigments were exposed on one side of the cornea, and the other six were exposed on the side of the eyelid.
According to the report, some products are labeled as “colored inside the lensâ€, which is contrary to the survey results. This time, it was not investigated whether pigment exposure was associated with health damage, but it is reported that many lenses of the eyeglasses indicate eye discomfort, and the research team plans to investigate its effects on the eye in the future.
According to the research group, special analytical instruments for precision instrument contamination detection were used for the first time in this survey. It is reported that the lenses have been consistently analyzed by optical microscopy or scanning electron microscopy. Due to the lack of resolution and sensitivity of the device, it is impossible to scientifically detect the pigment exposure on the lens surface.
According to the report, the results of testing 17 products sold on the market last fall showed that pigment components such as iron oxide or titanium oxide were detected on the surface of lenses from 10 of them.
As of 2009, Pingguang Meiluo lenses were sold as daily-use groceries in Japan, and there were no regulations on quality and sales, but there were many reports of impaired eye health of users. It has been pointed out that this is because the lens uses a difficult oxygen-permeable material, or the dye has an adverse effect.
In view of this, the Ministry of Health and Welfare has designated the contact lenses for the lenses and corrective vision as the "highly managed medical devices" prescribed by the Pharmaceutical Medical Devices Act (formerly the Pharmaceutical Affairs Law). Thereafter, its production and sales must pass national certification. As a result of the survey released by the National Life Center in May last year, the product was suspected of having quality problems, and the research team of the Ministry of Health and Welfare launched the survey.
Research representative and director of the Medical Devices Division of the National Institute of Pharmaceutical and Food Hygiene, Mr. Yoshishima Yuji, said: “It is very meaningful to demonstrate a scientifically based experimental method. It is hoped that manufacturers will make effective use of this achievement and strive to produce safe lenses. â€
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